Water vapor is water in a gas state instead of a liquid or a solid.
This condensation reaction is similar to that in which a peptide bond is formed between two amino acids (Chapter 3). Thus a single nucleic acid strand is a phosphate-pentose polymer (a polyester) with purine and pyrimidine bases as side groups. The links between the nucleotides are called phosphodiester bonds
Answer: natural selection
Explanation: Maybe because the A woodpecker was able to adapt a lot easier than the woodpecker B and its evolution was better
Neurons, act as the communicators of the nervous system. Neurons receive information, integrate it, and pass it along. They communicate with one another, with cells in the sensory organs, and with muscles and glands.
Information was taken from: http://www.sparknotes.com/psychology/psych101/thebrain/section2/
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